280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues/*
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * Copyright (C) 2011-2013 Intel Corporation
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues *
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * Permission is hereby granted, free of charge, to any person obtaining a
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * copy of this software and associated documentation files (the "Software"),
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * to deal in the Software without restriction, including without limitation
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * the rights to use, copy, modify, merge, publish, distribute, sublicense,
99c0082d40f9a2adf5108336c0d3dd087d1c7b66Johan B. C. Engelen * and/or sell copies of the Software, and to permit persons to whom the
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * Software is furnished to do so, subject to the following conditions:
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues *
b9e7ae4e6bc84d770daddde98d486686bdb123c7Johan B. C. Engelen * The above copyright notice and this permission notice (including the next
b9e7ae4e6bc84d770daddde98d486686bdb123c7Johan B. C. Engelen * paragraph) shall be included in all copies or substantial portions of the
b9e7ae4e6bc84d770daddde98d486686bdb123c7Johan B. C. Engelen * Software.
b9e7ae4e6bc84d770daddde98d486686bdb123c7Johan B. C. Engelen *
b9e7ae4e6bc84d770daddde98d486686bdb123c7Johan B. C. Engelen * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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9dc68827cbd515262ecb8d5ae8547d9e82c72e00Jon A. Cruz * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
9dc68827cbd515262ecb8d5ae8547d9e82c72e00Jon A. Cruz * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
99c0082d40f9a2adf5108336c0d3dd087d1c7b66Johan B. C. Engelen * SOFTWARE.
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris */
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris#ifndef DRM_RECT_H
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris#define DRM_RECT_H
99c0082d40f9a2adf5108336c0d3dd087d1c7b66Johan B. C. Engelen
99c0082d40f9a2adf5108336c0d3dd087d1c7b66Johan B. C. Engelen/**
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris * DOC: rect utils
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris *
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris * Utility functions to help manage rectangular areas for
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris * clipping, scaling, etc. calculations.
99c0082d40f9a2adf5108336c0d3dd087d1c7b66Johan B. C. Engelen */
99c0082d40f9a2adf5108336c0d3dd087d1c7b66Johan B. C. Engelen
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris/**
d6e289e892dd8c5f7c69425fe2722eb3fae4f48cKris * struct drm_rect - two dimensional rectangle
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @x1: horizontal starting coordinate (inclusive)
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @x2: horizontal ending coordinate (exclusive)
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @y1: vertical starting coordinate (inclusive)
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @y2: vertical ending coordinate (exclusive)
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues */
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBluesstruct drm_rect {
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues int x1, y1, x2, y2;
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues};
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues/**
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * drm_rect_adjust_size - adjust the size of the rectangle
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @r: rectangle to be adjusted
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @dw: horizontal adjustment
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * @dh: vertical adjustment
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues *
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * Change the size of rectangle @r by @dw in the horizontal direction,
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * and by @dh in the vertical direction, while keeping the center
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * of @r stationary.
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues *
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues * Positive @dw and @dh increase the size, negative values decrease it.
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues */
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBluesstatic inline void drm_rect_adjust_size(struct drm_rect *r, int dw, int dh)
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues{
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues r->x1 -= dw >> 1;
280e31bdf7f5ffd28f8b14565c1d93de4070bd0cJucaBlues r->y1 -= dh >> 1;
r->x2 += (dw + 1) >> 1;
r->y2 += (dh + 1) >> 1;
}
/**
* drm_rect_translate - translate the rectangle
* @r: rectangle to be tranlated
* @dx: horizontal translation
* @dy: vertical translation
*
* Move rectangle @r by @dx in the horizontal direction,
* and by @dy in the vertical direction.
*/
static inline void drm_rect_translate(struct drm_rect *r, int dx, int dy)
{
r->x1 += dx;
r->y1 += dy;
r->x2 += dx;
r->y2 += dy;
}
/**
* drm_rect_downscale - downscale a rectangle
* @r: rectangle to be downscaled
* @horz: horizontal downscale factor
* @vert: vertical downscale factor
*
* Divide the coordinates of rectangle @r by @horz and @vert.
*/
static inline void drm_rect_downscale(struct drm_rect *r, int horz, int vert)
{
r->x1 /= horz;
r->y1 /= vert;
r->x2 /= horz;
r->y2 /= vert;
}
/**
* drm_rect_width - determine the rectangle width
* @r: rectangle whose width is returned
*
* RETURNS:
* The width of the rectangle.
*/
static int drm_rect_width(const struct drm_rect *r)
{
return r->x2 - r->x1;
}
/**
* drm_rect_height - determine the rectangle height
* @r: rectangle whose height is returned
*
* RETURNS:
* The height of the rectangle.
*/
static int drm_rect_height(const struct drm_rect *r)
{
return r->y2 - r->y1;
}
/**
* drm_rect_visible - determine if the the rectangle is visible
* @r: rectangle whose visibility is returned
*
* RETURNS:
* %true if the rectangle is visible, %false otherwise.
*/
static int drm_rect_visible(const struct drm_rect *r)
{
return drm_rect_width(r) > 0 && drm_rect_height(r) > 0;
}
/**
* drm_rect_equals - determine if two rectangles are equal
* @r1: first rectangle
* @r2: second rectangle
*
* RETURNS:
* %true if the rectangles are equal, %false otherwise.
*/
static int drm_rect_equals(const struct drm_rect *r1,
const struct drm_rect *r2)
{
return r1->x1 == r2->x1 && r1->x2 == r2->x2 &&
r1->y1 == r2->y1 && r1->y2 == r2->y2;
}
int drm_rect_intersect(struct drm_rect *r, const struct drm_rect *clip);
int drm_rect_clip_scaled(struct drm_rect *src, struct drm_rect *dst,
const struct drm_rect *clip,
int hscale, int vscale);
int drm_rect_calc_hscale(const struct drm_rect *src,
const struct drm_rect *dst,
int min_hscale, int max_hscale);
int drm_rect_calc_vscale(const struct drm_rect *src,
const struct drm_rect *dst,
int min_vscale, int max_vscale);
int drm_rect_calc_hscale_relaxed(struct drm_rect *src,
struct drm_rect *dst,
int min_hscale, int max_hscale);
int drm_rect_calc_vscale_relaxed(struct drm_rect *src,
struct drm_rect *dst,
int min_vscale, int max_vscale);
void drm_rect_debug_print(const struct drm_rect *r, int fixed_point);
#endif /* DRM_RECT_H */